<!DOCTYPE html>
<html>
<head>
<style>
table { background: white }
col { background: green }
td { color: white }
</style>
</head>
<body>
<table>
  <col id="col" span="2">
  <tr>
   <td>One</td>
   <td>Two</td>
   <td>Three</td>
  </tr>
</table>
</html>
